tarmac

/ˈtɑːmæk/

noun

1.

a paving material that consists of crushed stone rolled and bound with a mixture of tar and bitumen, esp as formerly used for a road, airport runway, etc Full name tarmacadam (ˌtɑːməˈkædəm) See also macadam

tarmac

n.

1903 as a trademark name, short for tarmacadam (1882) "pavement created by spraying tar over crushed stone," from tar (n.1) + John Latin McAdam (see macadam). By 1919, tarmac was being used generally in Great Britain for "runway."